text: import { NotImplementedError } from '../extensions/index.js';
  
  /**
   * There's a list of file, since two files cannot have equal names,
   * the one which comes later will have a suffix (k),
   * where k is the smallest integer such that the found name is not used yet.
   *
   * Return an array of names that will be given to the files.
   *
   * @param {Array} names
   * @return {Array}
   *
   * @example
   * For input ["file", "file", "image", "file(1)", "file"],
   * the output should be ["file", "file(1)", "image", "file(1)(1)", "file(2)"]
   *
   */
  export default function renameFiles( names ) {
    let k = 1;  
      
    for (let i = 0; i < names.length;) {
      let res = names.indexOf(names[i], i+1);
      if (res === -1) {
        i++
        k = 1;
      } else {
        names[res] = names[res] + `(${k})`;
        k++;
        i = 0;
      }
    }  
  
    return names;  
  }
  